Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual classe tem uma Quantidade feita de 5?
 ###Tabelas: CREATE TABLE belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949 (belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Type VARCHAR, Fleet numbers VARCHAR, Quantity made INT, Manufacturer VARCHAR, Date made VARCHAR, Date withdrawn VARCHAR) CREATE TABLE first_generation_models (first_generation_models_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Power VARCHAR, Torque @rpm VARCHAR, Displacement (cc) INT, Engine VARCHAR) CREATE TABLE al-ahly_results (al-ahly_results_id AUTO_INCREMENT PRIMARY KEY, Team 1 VARCHAR, Agg. VARCHAR, Team 2 VARCHAR, 1st leg VARCHAR, 2nd leg VARCHAR) CREATE TABLE 2009_regular_season_football_standings (2009_regular_season_football_standings_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Team VARCHAR, Division Record VARCHAR, Overall Record VARCHAR, Season Outcome VARCHAR) CREATE TABLE series (series_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Processors Supported VARCHAR, FSB/HT Frequency (MHz) VARCHAR, Memory VARCHAR, PCI-Express VARCHAR, SATA VARCHAR, PATA VARCHAR, Sound VARCHAR)  
SELECT Class FROM belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949 WHERE Quantity made = 5